Blast-furnace construction.



J. soon. BLAST FURNACE CONSTRUCTION.

APPLIGATIOH FILED HAYS, 1910.

1,013 6,350; Patented Aug. 20, 1912.

I x v JAMES SGOTT,- O35 PITTSBUEGH, PEI'IHSYILVAR 1 1 BLAST-FURNACE CQNSTEUCTIGN.

.useful Blast-Furnace Construction, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to the construction of blast furnaces and one object of the invention is to provide improved means by which the lines, (2'. e. the contour of the inner surface) of the lining in the furnace are maintained for an-indefinite time after starting the operation of such furnaces.

A further object of the invention is to provide improved means for supporting the furnace shell upon the columns carrying the shaft of the furnace.

Heretofore, blast furnaces have been provided with relatively thick refractory linings which become reduced in thickness and are cut away in irregular channels or grooves, within a short time after the furnaces are started in operation. it has also been proposed to entirely omit the refractory lining from the upper part of the furnace shell.

Figure l'of the drawings 18 a vertical sec tion of a blast furnace constructed and ar-' ranged in accordance with my invention. Fig. 2 is a detail sectional elevation, on a larger scale, showing connections between the furnace shell and supporting'coluinns and the means employed for water cooling the furnace at the junction of the boshwith the shaft of'the furnace according to my invention." I

Tn the drawings, 2 designates the hearth or Well, 3 the bosh and 4 the shaft of a blast furnace. The furnace well is provided with an iron notch or tapping hole 5 constructed in theusual manner. 7

' AIn'etal' shell 6'is provided and a thin refractory lining 7 isbuilt within the fur-- nace shell, which preferably extended short distance above the branches 8 leading to the downcomer and dust-catchers of the furnace. Above the top of the refractory lining 7 is a metal shell 9 having a hood portion 10 and chute 11. The upper portion of the furnace is provided with the usual bottom bell 12 and hopper 13, or

gas sealing bell 14Qandnopper 15, the top Specification of Letters Eatent.

manner-and each of the annul- Patented Aug. 29, 1912.

Application filed May 3, 1910. Serial 230. 559,092".

hopper being closed by means of the hell 1% and its upper end communicating with the chute 11.

The bells l2 and is are connected by suitable bell rods with counter weighted bell levers in the usualmanner and any desirable belloperating gear may be employed for manipulating the bells in charging the furnace. v

A skip car lil travels on the skip hoist 17,

the skip hoists and ears being constructed and operated in any well lrnown manner, which need not be further described.

instead of providing twyer openings in the upper part of the well of the furnace in which the twyersand twyer coolers are in-- sorted when the furnace is in'operation, I provide an annular nietal'ring which is made in segments and preferably is water cooled, the segments being securelybolted together. Each of the segn'ients efthe ring 18 is provided with an opening 19 throughwhich the twyer cooler extends. The openings 19 in the segmental ring are machined accurately to size, the centers of the openings being at the same level inone plane and on radial lines extending from the vertical center of the ring 18, corresponding to the vertical center of the furnace.

The outer metal shell of the furnace 6 is provided with a series of annular water troughs, 21, 21 21", withtheir lower ends extending below the top edge of the next adjacent trough. l Vater is supplied to the troughs,"separately or many other desirable troughs is provided with an overflow pipe 22, which leads the. water from the top ofthe troughs into the next lower trough. By reference to Fig.- 2 it will be seen that the water trough 23 is connected by openings 24 with the upper portion of, the water trough 23 and that the lower part 2-3 of the trough is entirely inclosed instead of being open at its upper end, as are the other troughs.

The gas out-let openings 8 in the top of the furnace are located at some distance below the furnace charging bell 12, in order to provide a dead space in which a body of comparatively cool gases is maintained.

This construction results in keeping the bell shell is secured to the columns 25, the usual mantle plate being dispensed with in this construction. Thebustle pipe 27 is carried on brackets 28 which are secured to the columns in the usual manner, and the water trough 29 is mounted on'similarly constructed brackets 30 also secured to the furnace columns. The top platform 31 of the furnace is carried upon columns 32 whose bases are mounted on the tops of'the furnace columns 25.

' branches ply pipe to the various troughs in the height ater is supplied to the annular troughs 21 through a supply pipe 33, suitable preferably leading from this supof the furnace, although the troughs may be filled by water which overflows from the next higher trough when necessary or desirable.

The furnace. is charged in theusual manner and the operation of the furnace is the same as heretofore, the gas being led off from the furnace at a point considerabl been the practice.

The advantages of my. invention'will be apparent to those skilled in the art.

Instead of providing a thick refractory lining which becomes worn at the beginning of the'operation of the furnace, I pro vide a thin refractory lining and effectively water cool this lining from the time the furnace is putinto blast, in this way mainlower in the furnace than has heretofore taining the thickness and contour of the practi of the inner surface of the furnace lining cally constant throughout the life furnace.

The use o a mantle plate is done away with and the furnace shell is connected directly to the furnace columns in a highly novel and efficient manner.

Modifications in the construction and arrangement of the parts may be made without departing from my invention.

I claim l. In a blast furnace, a jacket or shell formed of rolled metalplates, the part of said shell above the bosh line being extended downwardly to form an annular ring and columns connected to said annular ring and directly supporting said shell.

2. In a blast furnace a continuous shaft and bosh jacket or shell formed of rolled metal plates, said shaft jacket having an annular extension forming a ring projecting dcv. nwardlybelow the bosh line of the furnace and a series of columns connected to said ring and directly supporting the jacket.

3. In a blast furnace a continuous shaft and bosh jacket formed of rolled metal plates and having means on the outside of the jacket forwater cooling said jacket, said 'means being arranged ,to completely surround the jacket with an encircling wall of water extending uninterruptedly from the bottom of the bosh jacket to the upper end of the shaft jacket.

4. In a blast furnace, bosh and shaft jackets formed of rolled metal plates, and having the lower end of the shaft jacket secured to the upper end of the bosh jacket, and a series of water troughs on the outside of said jackets, the jackets forming one side of the troughs, said troughs having means whereby the top of one trough overlaps the bottom of the adjacent trough, and a continuous unbroken wall of water surrounds said jacket from the bottom of the bosh jacket to the 'gas offtakes in the upper end of the shaft.

5.'In a blast furnace a jacket or shell continuously from the bottom of the bosh formed of rolled metal plates and extending jacket to the upper end of the shaft jacket,

columns directly connected to and supporting the jacket and a series of water troughs encircling said jacket, said jacket forming one side of the troughs, the top of one trough overlapping the bottom of the adjacent trough and water overflow outlets in said troughs arranged to cause overlapping of I the water in said troughs whereby an uninterrupted vertical wall of water surrounds the jacket from the top to the bottom thereof.

6. In a blast furnace the combination with a metal bosh and shaft jacket, and a series of supporting columns directly connected said jacket, of a series of encircling water troughs surrounding said jacket, said troughs being positioned with the upper end of one trough overlapping the lower end of the adjacent trough, and means on said troughs for maintaining a water level therein wher by-an uninterruptedwall of cooling water surrounds said jacket from the top to the bottom thereof.

In testimony whereof, I have hereunto set my hand.

JAMES SCOTT. v Witnesses:

J. P. COLLINS, Gnoncn H. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' WashingtomD. G. 

